A micromachined mechanism (5) for a sensing tool (1), the mechanism comprising a support, a probe, pivotally mounted with respect to the support, a beam (10) connected to the support (8), and the probe, the probe (9) being intended to apply a load (Ftool) on a body (2, 32), and to be subjected to a counter-reaction contact force exerted by the body in reaction to the load, the beam being configured to shift from an undeformed position to deformed position when the contact force of the body (2) is greater than a predetermined threshold force (Fcrit) for which the beam (10) buckles.